Use singleline if for uuid validation

src/loaders/ObjectLoader.js

@@ -456,13 +456,11 @@ Object.assign( ObjectLoader.prototype, {
 
 		for ( var i = 0; i < json.length; i ++ ) {
 
-			var clip = AnimationClip.parse( json[ i ] );
+			var data = json[ i ];
 
-			if ( json[ i ].uuid !== undefined ) {
+			var clip = AnimationClip.parse( data );
 
-				clip.uuid = json[ i ].uuid;
-
-			}
+			if ( data.uuid !== undefined ) clip.uuid = data.uuid;
 
 			animations.push( clip );